I'm tempted by emacs/evil as well, but everytime I try to make the switch I run into two problems:

1) intial emacs setup: it feels really tricky to just get basic editor sanity configured (auto-indent, syntax highlighting, etc.)

2) I worry that by using evil mode, I lose out on a lot of the goodness of emacs major and minor mode's. Do you remap everything to be more vi-ish for each mode that you use? I guess that is fine but the transition just seems daunting.